Buccal tube



FIG. 1 is an isometric view of a buccal tube;

FIG. 2 is a top view thereof;

FIG. 3 is a right side thereof;

FIG. 4 is a left side thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a bottom view thereof.

The dash-dot lines define the boundary lines of the claimed design. The broken lines shown in the figures are included for the purpose of illustrating environmental and form no part of the claimed design. 

CLAIM The ornamental design for a buccal tube, as shown and described. 